#1F539C#1F539C

#1F539C is a dark, vivid blue. Relative luminance 0.089; OKLCH L 44.9% C 0.131 H 257.8°. Best body text is #FFFFFF at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#1F539C
RGB	rgb(31, 83, 156)
HSL	hsl(215, 67%, 37%)
HSV	hsv(215, 80%, 61%)
CMYK	cmyk(80.1%, 46.8%, 0%, 38.8%)
CIE-LAB	lab(35.75, 10.27, -44.65)
CIE-LCH	lch(35.75, 45.81, 282.95°)
OKLab	oklab(44.91% -0.0278 -0.1281)
OKLCH	oklch(44.91% 0.131 257.8)
XYZ	xyz(9.6569, 8.8770, 32.6505)
Luminance	0.0888 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F539C #9C681F

analogous

#1F929C #1F539C #2A1F9C

triadic

#1F539C #9C1F53 #539C1F

tetradic

#1F539C #9C1F92 #9C681F #1F9C2A

square

#1F539C #9C1F92 #9C681F #1F9C2A

split-complementary

#1F539C #9C2A1F #929C1F

monochromatic

#0B1D36 #153869 #1F539C #296ECF #588FDE

Accessibility & contrast

On white

7.57

#1F539C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#1F539C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F539C

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F539C	#FFFFFF	#000000	##FFFFFF
##1F539C	1.00	7.57	2.78	7.57
#FFFFFF	7.57	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C5A9F

Deuteranopia (green-blind)

#0C4F9B

Tritanopia (blue-blind)

#006470

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1f539c;
/* rgb */ color: rgb(31, 83, 156);
/* oklch */ color: oklch(44.9% 0.131 257.8);

Tailwind

colors: {
  custom: {
    50: '#6f82ba',
    500: '#1f539c',
    950: '#000000',
  },
}

SCSS

$custom: #1f539c;
$custom-light: #6f82ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f539c",
  "rgb": {
    "r": 31,
    "g": 83,
    "b": 156
  },
  "hsl": {
    "h": 215.04,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.44912,
    "c": 0.13113,
    "h": 257.8
  },
  "luminance": 0.08878
}

Semantic roles & 50–950 ramp

primary

#1F539C

secondary

#C19455

accent

#A23EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1F539C

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →